This is also a dry run, no files will be transferred. 40022 is naturally the port number and blowfish is type of encryption used for connection (it's the fastest one for transferring files).

The "-rltgoDvzx" parameters will make rsync transfer entire directory recursively with all possible subdirectories, without files/dirs from other mounted volumes in the path. Try # man rsync to see what all the options mean.

Are you planning to make some public site from which other people (such as myself) could download backups ?

The database backups contain private stuff like password hashes (=passwords), PM's and email addresses, so we can't give them out. Only bitcoin.org admins (Satoshi, Gavin, me) have the access.

Ah sure, forgot about that.Well, there is always a possibility of cutting out all sensitive data from the database to make a public read-only forum backup (nobody will be able to login to it since it would contain no hashes, so just read-only).